My 1992 Saab 900 Turbo Convertible is very nice shape recently had the abs light come on. The brakes then locked or should I say can stop but it is very difficult when the brake is applied. My mechanic over the phone is already telling me $1000 for a new used ABS System. Others are saying start with a fuse..............please help me answer the right questions.
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Well, it could mean that the emergency brake has not been fully released.The ABS system light is on if something has occurred within the ABS system. Something faulty may have happened there, get it checked out!
ABS light on likely means that one of the sensors is not sending the right signal to the ABS Brake Module. So, standard braking exists as a consequence. It should be less safe to drive with this condition, but can be driven if you pump your brakes manually on slick roads.
The ABS light should only come on when there is a problem in the ABS system: a wheel sensor or hydraulic unit problem.
The ABS system shouldn't be interconnected to the engine system so that an ABS fault shuts down the engine. Are you sure as to cause and effect? Could a shorting out of the ignition switch (thereby switching off the engine) be lighting the ABS lamp?
Get a wiring diagram and check for good grounds at the appropriate locations for a 1990 SAAB; also check for possible shorting out of the ignition switch under fault conditions.
The best source of info on this car is the "Bentley Bible" aka the Saab 900 Official Service Manual, costs about $40 from Amazon!
the sensors u had replaced will not affect the ABS brake system, while this light is on your Antilock Brake System is disabled, if u need this very important safety feature u are out of luck, have the system codes tested for the ABS and the check enhgine light, go to a VW dealer, don't waste your time on any technician who says to ignore an ABS light warning!!
check each abs sensor at the axels. they are typically the magnetic pick up type. the grooves on the axels should be free of debris. make sure the pick up is working by using a multimeter and checking the resistance of it. An OL reading indicates an open curcuit. If the sensors check good than check all lines, fittings, break pads and calipers of the break system, there are pressure sensors in the break system a leak could activate the ABS light. If all that checks out, check the technical service bullitens for info. It may be the ABS control module could be bad. Hope this helps
This happend to my car and it was the ABS module that failed. It does not harm your car you just don't have ABS. Try to replace the ABS sensor first since it is a lot less expensive and a lot less work. If that does not do the trick you will most likely have to replace the module itself. That cost big $$. A new one is about 1200-1500. I bought one from a wrecked card for 300 and it has worked fine for years.